The week in pictures: 4 October 2013

A team of expert cavers and photographers had been exploring caves in the Chongquing province of China - when they were amazed to discover the entrance to a hidden cave that was previously undiscovered. When they entered the cave, they found it was so large there was even a cloud inside it. Photographer and caver Robbie Shone, from Manchester, was part of a team of 15 explorers on a month-long expedition who stumbled across the natural wonder.Picture: Robbie Shone/ CATERS